Hi @MMacca,
Interesting that Google Annotations appeared for a couple of the emails you sent to your Gmail. You mentioned that you built this email using the drag-and-drop editor, but at any point, did you or anyone on your team edit the source code of a text block or add an HTML block that allowed Google to see annotations? This article, by Google, explains how to add code to your emails that add annotations, and can technically be done in text/HTML blocks in the drag and drop editor.
Additionally, were these templates you used uploaded to Klaviyo from your device, or a 3rd party?